You can buy right now but you have to travel to japan or order online if they support that kind of payment method. If you haven't heard japan have legalize bitcoin and crypto currencies and accepted it as a form of payment in their local businesses, merchants and commerce. So its not surprising that you can buy through digital currency also they're the leading manufacturer of gadgets, automobile and appliances so you can guarantee the quality.
not only in japan but almost on any other countries or websites online , crypto is now accepted for purchasing every stuff you imagine and of course that includes automobile's . there is site that even sell real estates and that will cost too much more than a car but thats not impossible especially to a hobyist that is using his cryptos for buying things that he might like .
although not yet comprehensive, but I think this is a good development, we can buy something online, and indeed I think there are currently many online stores that provide these services. but it will be different from offline stores where in our country is prohibited from using cryptocurrency, even though there has been progress going into the stock market